Mounted Brass Brush made with .003" wire in an end shape has a 1/8" head dia. and 1/4" trim length 3/32" shank. Made In USA. 25000 RPM Max Speed. Brass Brushes are suitable for use on all metal surfaces for removing rust and corrosion, deburring, cleaning, edge blending and other surface texturing and preparation. Made with .003" and .005" wire, Style A-MB4.